package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品和对应的口味
     *
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //向菜品表插入1条数据
        dishMapper.insert(dish);
        //获取insert语句生成的主键值
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);//后绪步骤实现
        }
    }

    /**
     * 菜品分页查询
     * @param dto
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dto) {
        PageHelper.startPage(dto.getPage(),dto.getPageSize());
        log.info("分页查询参数：{}",dto);
        Page<DishVO> page = dishMapper.pageQuery(dto);
        List<DishVO> records = page.getResult();
        Long total = page.getTotal();
        return new PageResult(total,records);
    }

    /**
     * 批量删除菜品
     * @param ids
     */
    @Override
    public void delete(List<Long> ids) {
        //判断菜品是否和套餐处于关联状态 setmeal_dish 查表状态
        for (Long id : ids) {
            //菜品启用状态
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
            //当前菜品被套餐关联了，不能删除
            List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
            if (setmealIds != null && setmealIds.size() > 0) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
            }

            //删除菜品表中的菜品数据
            dishMapper.deleteById(id);//后绪步骤实现
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);//后绪步骤实现
        }
    }

    /**
     * 批量起售停售
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        dishMapper.startOrStop(status,id);
    }

    /**
     * 修改菜品
     * @param dto
     */
    @Override
    public void update(DishDTO dto) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dto,dish);
        dishMapper.update(dish);
    }
    /**
     * 根据id查询菜品和对应的口味数据
     * @param id
     * @return
     */
    @Override
    public DishVO getById(Long id) {
        Dish dish = dishMapper.getById(id);
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 根据分类id查菜品
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> list(Integer categoryId) {
        List<Dish> list = dishMapper.list(categoryId);
        return list;
    }

}